It's the final countdown to the Christie Clinic Illinois Marathon.At this point, the training is pretty much over for runners.Race day brings its own challenges, however. WCIA 3's Cynthia Schweigert sat down with a physical trainer to find out what aches and pains you can expect during your run.

MTD services will be affected by the Christie Clinic Illinois Marathon
races on Friday, April 29 and Saturday, April 30. Friday reroutes begin
at 6:00 pm and Saturday reroutes start at the beginning of the service
day. Friday service changes affect the Yellow, Blue, Green, 9A and 9B
Brown, Gold, Silver, Navy, Illini, and Air Bus routes. Saturday service
changes affect every MTD route. You can expect delays.